Excuse me pal but that 4 letters domain is not pronounceable, I think you paid for it about low xx thinking in recovering and double or triple your investment, bad news pal, being 4 letters is nothing if the domain cannot be pronounced unless you find a company who uses it as an acronym but believe me the chances are low. You can aspire up to low xx mid xx if and only if the buyer is really interested in owning that combination, but again low chances.
Regarding Fresh Frozen, indeed 6 other extension taken but none developed this can give you a clue about the ability of the term to be monetized. However the PPC price is 17 cents so your best shot is park it and try to make some cents out of it, perhaps at the end of the year you could pay the renewal fee. You cannot aspire more than low xx with this one.